印刷电路板振动特性及防振包装原理

Vibration Property and Vibration-proof Packaging Principle of Printed Circuit Board

将随机激励条件下的印刷电路板的防振包装模型简化为两自由度弹簧-质量系统,以内部易损元件的响应作为主要衡量指标,分析了印刷电路板的振动特性和防振包装原理。结果表明,采用两自由度模型能得到更为合理的结果,且简化模型中应采用等效质量代替印刷电路板的实际质量。

The vibration - proof package model of PCB was simplified as TDOF system under random excitation conditions. The vibration response of internal critical component was considered as main index of evaluation, and the vibration property and vibration-proof package principle of printing circuit board were analyzed. Results showed that the TDOF vibration model can get more reasonable resuhs, and equivalent mass can substitute for actual mass of PCB in simplified model.